Electrochromic behavior of amorphous tungsten oxide (formula available in paper)doped films was investigated. The addition of titanium (5 %mol), noibium (5 %mol), tantalum (5 %mol) and lithium salt (15 %mol) to the precursor solutions leads to films with different electrochemical performance. The electrochormic properties of these films were investigated by in situ spectroelectrochemical method exhibiting a blue coloration under Li⁺ insertion with a reversible variation of the transmittance in the visible and near infrared range between 10% and 90%. The electrochemical and optical responses of the films were obtained from the cyclic voltammetry measurements using propylene carbonate with 0.1M LiC1O₄ as electrolyte. The bleaching process in the lithium doped films occurs in a few seconds and faster response for the bleaching was obtained for WO₃:Li:Ti film.

Date Published: 13 November 2000
PDF: 7 pages
Proc. SPIE 4104, Organic Photorefractives, Photoreceptors, and Nanocomposites, (13 November 2000); doi: 10.1117/12.406485

Published in SPIE Proceedings Vol. 4104:
Organic Photorefractives, Photoreceptors, and Nanocomposites
Keith L. Lewis; Klaus Meerholz; Klaus Meerholz, Editor(s)